Windows 7 will not detect my second monitor

I have a PC running Windows 7 Professional and Windows Vista Ultimate with a dual boot setup.  I have two screens pluged into an Nvidia GTS 8800 video card.  The first screen is an HP 22" lcd which is plugged directly into one of the two DVI outputs on the video card.  The second screen is a Sharp 52", 1080p HDTV which is plugged into the second DVI port on the video card via an HDMI cable plugged into a HDMI to DVI adapter.
Both monitors work perfectly when I boot to Windows Vista but when I boot to Windows 7 the 52" screen is not recognized at all.  If I switch the cords plugged into the video card the 52" will work and the 22" will not be detected.

Please help,


Question Info

Last updated March 27, 2020 Views 375,967 Applies to:

Hi Nick,



You may access the link below and follow the steps to setup dual monitor on your computer and check if it helps in detecting the secondary monitor.



If you are still unable to get the secondary monitor detected, I would suggest you to access the display card manufacturer’s website and download the latest drivers for Windows 7 and install it and check if it helps you fix the issue.  You may access the link below and try to find and download the drivers for the display card or you may run the option 2 to automatically find the drivers for Nvidia products.



Also you may try to update the display drivers from device manager and check if it helps. Access the link below and follow the steps to update drivers on your computer.


Hope this helps. Let us know the results.

Thanks and Regards,

Srinivas R Microsoft Support.

Visit our Microsoft Answers Feedback Forum and let us know what you think.

75 people were helped by this reply


Did this solve your problem?

Sorry this didn't help.

Great! Thanks for marking this as the answer.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this response?

Thanks for your feedback.